WGU D481 OA SECURITY FOUNDATIONS EXAM 2

WGU D481 OA SECURITY FOUNDATIONS EXAM 2
VERSIONS (VERSION A AND B) COMPLETE 500
QUESTIONS WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) /ALREADY GRADED A+
A set of protocols made up of four layers (Application, Transport, Network, Network
Interface Layer) used to connect network devices to each other - ANSWER: TCP/IP
(Transmission Control Protocol/Internet Protocol)

TCP/IP model layer that establishes how data should be physically sent through the
network.

Ethernet


In conjunction with layers 1 PHYSICAL and 2 DATA LINK - ANSWER: Network Interface
Layer (TCP/IP)

TCP/IP model layer that defines the logical transmission protocols for the whole
network.

- IP ( Internet Protocol)
- ARP ( Address Resolution Protocol)
- ICMP (Internet Contol Message Protocol)
- IGMP

in conjunction with layer 3 NETWORK of the OSI Model. - ANSWER: Network Layer
(TCP/IP)

TCP/IP model layer that s responsible for the end-to-end transport of data. The
protocols that live in this layer are.

- TCP (Transmission Control Protocol)
- UDP (User Datagram Protocol)

In conjunction with layer 4 TRANSPORT of the OSI Model - ANSWER: Transport Layer
(TCP/IP)

TCP/IP model layer that is responsible for the communication protocols between
nodes. The protocols in this layer include.

- HTTP (Hyper Text Transfer Protocol)
- SSH (Secure Shell)
- FTTP
- Telnet

, - NTP (Network Time Protocol)
- DHCP
- PING

In conjunction with Layers 5 SESSION, 6 PRESENTATION, AND 7 APPLICATION of the
OSI model. - ANSWER: Application Layer (TCP/IP)

Layer 1 of the OSI Model responsible for the physical connections of the devices in
the network. This layer is implemented through the use of devices such as hubs,
repeaters, modem devices, and physical cabling. - ANSWER: Physical Layer (OSI
model)

Layer 2 of the OSI Model responsible for the error-free delivery of data to the
receiving device or node. This layer is implemented through the use of devices such
as switches and bridge devices, as well as anything with a network interface, like
wireless or wired network cards. - ANSWER: Data Link Layer (OSI Model)

Layer 3 of the OSI Model responsible for the transmission of data between hosts in
different networks as well as routing of data packets. This layer is implemented
through the use of devices such as routers and some switches. - ANSWER: Network
Layer (OSI Model)

Layer 4 of the OSI Model provides services to the application layer and receives
services from the network layer and is responsible for the reliable delivery of data. It
segments and reassembles data in the correct order for it to be sent to the receiving
device. It may also handle the reliable delivery of data and any retries of data that
are lost or corrupted (for example, TCP does this). This layer is often called the heart
of OSI. - ANSWER: Transport Layer (OSI Model)

Layer 5 of the OSI Model responsible for connection establishment, session
maintenance, and authentication. - ANSWER: Session Layer (OSI Model)

Layer 6 of the OSI Model responsible for translating data from the application layer
into the format required to transmit the data over the network as well as encrypting
the data for security if encryption is used. - ANSWER: Presentation Layer (OSI Model)

Layer 7 of the OSI Model responsible for network applications (like HTTP or FTP) and
their production of data to be transferred over the network. - ANSWER: Application
layer (OSI model)

A device that is necessary for sending and receiving data. They allow computers to
transport digital information over analog lines such as phone or cable lines. The
three types of these devices include cable, DSL, and satellite.

They operate at Level 1 and 2 of the OSI Model - ANSWER: Modem